diff --git a/ArchiSteamFarm/Steam/Data/InventoryResponse.cs b/ArchiSteamFarm/Steam/Data/InventoryResponse.cs
index 7ca733a54..b2b865e03 100644
--- a/ArchiSteamFarm/Steam/Data/InventoryResponse.cs
+++ b/ArchiSteamFarm/Steam/Data/InventoryResponse.cs
@@ -33,7 +33,7 @@ using Newtonsoft.Json.Linq;
 namespace ArchiSteamFarm.Steam.Data;
 
 [SuppressMessage("ReSharper", "ClassCannotBeInstantiated")]
-internal sealed class InventoryResponse : ResultResponse {
+internal sealed class InventoryResponse : OptionalResultResponse {
 	[JsonProperty(PropertyName = "assets", Required = Required.DisallowNull)]
 	internal readonly ImmutableHashSet<Asset> Assets = ImmutableHashSet<Asset>.Empty;
 
diff --git a/ArchiSteamFarm/Steam/Data/OptionalResultResponse.cs b/ArchiSteamFarm/Steam/Data/OptionalResultResponse.cs
new file mode 100644
index 000000000..08037b40f
--- /dev/null
+++ b/ArchiSteamFarm/Steam/Data/OptionalResultResponse.cs
@@ -0,0 +1,35 @@
+//     _                _      _  ____   _                           _____
+//    / \    _ __  ___ | |__  (_)/ ___| | |_  ___   __ _  _ __ ___  |  ___|__ _  _ __  _ __ ___
+//   / _ \  | '__|/ __|| '_ \ | |\___ \ | __|/ _ \ / _` || '_ ` _ \ | |_  / _` || '__|| '_ ` _ \
+//  / ___ \ | |  | (__ | | | || | ___) || |_|  __/| (_| || | | | | ||  _|| (_| || |   | | | | | |
+// /_/   \_\|_|   \___||_| |_||_||____/  \__|\___| \__,_||_| |_| |_||_|   \__,_||_|   |_| |_| |_|
+// |
+// Copyright 2015-2022 Łukasz "JustArchi" Domeradzki
+// Contact: JustArchi@JustArchi.net
+// |
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// |
+// http://www.apache.org/licenses/LICENSE-2.0
+// |
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+using JetBrains.Annotations;
+using Newtonsoft.Json;
+using SteamKit2;
+
+namespace ArchiSteamFarm.Steam.Data;
+
+[PublicAPI]
+public class OptionalResultResponse {
+	[JsonProperty(PropertyName = "success", Required = Required.DisallowNull)]
+	public EResult? Result { get; private set; }
+
+	[JsonConstructor]
+	protected OptionalResultResponse() { }
+}
diff --git a/ArchiSteamFarm/Steam/Data/ResultResponse.cs b/ArchiSteamFarm/Steam/Data/ResultResponse.cs
index 277b0cc51..67edd56e0 100644
--- a/ArchiSteamFarm/Steam/Data/ResultResponse.cs
+++ b/ArchiSteamFarm/Steam/Data/ResultResponse.cs
@@ -19,7 +19,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-using System.Diagnostics.CodeAnalysis;
 using JetBrains.Annotations;
 using Newtonsoft.Json;
 using SteamKit2;
@@ -27,7 +26,6 @@ using SteamKit2;
 namespace ArchiSteamFarm.Steam.Data;
 
 [PublicAPI]
-[SuppressMessage("ReSharper", "ClassCannotBeInstantiated")]
 public class ResultResponse {
 	[JsonProperty(PropertyName = "success", Required = Required.Always)]
 	public EResult Result { get; private set; }
diff --git a/ArchiSteamFarm/Steam/Integration/ArchiWebHandler.cs b/ArchiSteamFarm/Steam/Integration/ArchiWebHandler.cs
index cee42f07c..7e6248d7d 100644
--- a/ArchiSteamFarm/Steam/Integration/ArchiWebHandler.cs
+++ b/ArchiSteamFarm/Steam/Integration/ArchiWebHandler.cs
@@ -208,8 +208,8 @@ public sealed class ArchiWebHandler : IDisposable {
 				throw new HttpRequestException(string.Format(CultureInfo.CurrentCulture, Strings.ErrorObjectIsNull, nameof(response)));
 			}
 
-			if (response.Content.Result != EResult.OK) {
-				throw new HttpRequestException(!string.IsNullOrEmpty(response.Content.Error) ? string.Format(CultureInfo.CurrentCulture, Strings.WarningFailedWithError, response.Content.Error) : Strings.WarningFailed);
+			if (response.Content.Result is not EResult.OK) {
+				throw new HttpRequestException(!string.IsNullOrEmpty(response.Content.Error) ? string.Format(CultureInfo.CurrentCulture, Strings.WarningFailedWithError, response.Content.Error) : response.Content.Result.HasValue ? string.Format(CultureInfo.CurrentCulture, Strings.WarningFailedWithError, response.Content.Result) : Strings.WarningFailed);
 			}
 
 			if (response.Content.TotalInventoryCount == 0) {